<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script type="text/javascript" src="./js/ctx.js"></script>
</head>
<body>
<div id="cesiumContainer">
</div>
<div id="toolbar">
    <div id="zoomButtons"></div>
</div>
<script>
    var initCesium = new InitCesium();
    var viewer = initCesium.initViewer('cesiumContainer', {
        terrainProvider : new Cesium.ArcGISTiledElevationTerrainProvider({
            url: 'https://elevation3d.arcgis.com/arcgis/rest/services/WorldElevation3D/Terrain3D/ImageServer'
        })
    });
</script>
</body>
</html>